Automatic phasing of MR images. Part I: Linearly varying phase

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Abstract

In spin-echo and well shimmed gradient-echo images, the phase of the complex image often varies linearly in both the readout and phase-encode directions. Thus, in principle, it is possible to display an image in absorption mode. However, manually determining the two first-order and one zero-order phase parameters needed to display an absorption-mode image is a formidable task. In this paper, the Bayesian calculations needed to automatically determine these parameters are presented, and the calculations are illustrated using spin-echo images.

Original languageEnglish
Pages (from-to)184-192
Number of pages9
JournalJournal of Magnetic Resonance
Volume191
Issue number2
DOIs
StatePublished - Apr 1 2008

Keywords

  • Absorption-mode images
  • Bayesian probability theory
  • Frequency estimation
  • Zero- and first-order phase estimation

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